[CLEANUP] Cleanup calls and docheaders in Core/Classes/Resource

In the Core/Classes/Resource Folder many calls to classes can be
used with shorthand syntax (without the namespace).

Many docheaders miss one or more @throws clauses for Exceptions to throw.

Resolves: #44476
Releases: 6.1, 6.0

Change-Id: Ia9c4b6e29fa924d42df8ff0e1e68ed607ce8256f
Reviewed-on: https://review.typo3.org/17913
Reviewed-by: Christian Kuhn
Tested-by: Christian Kuhn